Apparatus for sterilizing liquids by means of ultraviolet rays.



A. NEVEU. APPARATUS FOR STERILIZING LIQUIDS BY MEANS OF ULTRAVIOLET RAYS.

APPLICATION FILED JUNE 19, 1911.

2 Mm M mm tor B pT Q M: M n m h P fir no! v a A. NEVBU. APPARATUS FOR STERILIZING LIQUIDS BY MEANS OF ULTRAVIOLET RAYS.

APPLIUATION FILED JUNE 19, 1911.

Patented Sept. 17, 1912.

2 SHEETS-SfifiET 2.

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ALFjnED nnvnu,

or PARIs',rnANoE, AssIGNon T0 sooinrn ANONYME rnANoAIsE nrrn: BANQUE nu RADIUM, oF-rAnIs, FRANCE.

APPARATU$ FOR STERILI ZING LIQUIDS BY MEANS OF ULTRAVIOLET RAYS.

To all whom it may concern: Be it known that I, ALFRED NnvnU, a citizen-of the French Republic,- residing at 13 Rue Vignon, Paris, Department of the Seine, France, have invented certain new and usefullmprovements in Apparatus for sterilizing Liquids b Means of Ultraviolet-Rays, of which t e following is .a

specification.

In the apparatus known at present-and employed for sterilizing liquidsby means of ultra-violet rays, the sources which emit the ultra-violet rays are either arranged at a certain height above the liquid or ink;

mersed in the liquid itself.

Disadvantages are connected with these I. two methods ofprocedure.

In the first case the whole'of the -ultra violet rays which are emitted from the part of their source that is not turned directly toward the liquid, exercise no eifect on the latter or at least only avery slight efleot I complication in the construction of the a if a reflector be employed, the consequence of which is an important loss of efiectiveneSS.

In the second case the source of ultraviolet rays must be surrounded by a double casing of quartz in order to prevent any condensation of the substance contained in it,f,mercury for example, on itssides. This condensation in fact puts an end tothe ultra-violet rays. The necessity of having a" double side or wall causes considerable example in the accompanying drawings:

Figure 1 is a vertical section of the apparatus. Fig. 2 is a horizontal section throughA B in Fig. 1. Fig. 3a vertical section through C D in Fig. 4 of another apparatus of the same kind. Fig. 4 is a plan thereof.

The apparatus consists substantially of a metal cylinder 1 of relatively little height and provided with a junction pipe 2 Specification of Letters I'atent.

Application filed June 19, 1911.

Patented Sept. 1'7, 1912.

Serial No. 633,955.

5 through which the liquid enters. This pipe is ,ofcircular section in its exterior part so f that it :canbe connected with any system of pipes whatever. The arrangement on the side of the cylinder is such that the liquid is forced to pass through an opening 3 of rectangular section of the same height as the cylinder 1, but a width of a few milli- .meters only. The liquid, which is under pressure is rapidly rotated, the consequence 5 of which is that when the cylinder 1 is full the level of the liquid is centrally depressed above the outlet pipe 4, so as to leave a cavity which assumes practically the form of a paraboloid of revolution.

By lowering a source of ultra-violet rays through the passage 5, in the direction of the j axis of this cavity, absolute certainty is assured that the whole of the liquid that escapes through the pipe 4 will be sterilized. The sterilization will in fact bevery complete, in consequence of the relatively long time, during which the liquid is exposed to the action of the ultra-violet rays.

Owing to this arrangement the sourceof ultra-violet rays is below the upper level of the liquid, so thatnearly the whole of the ultra-violet rays is utilized, without any :com lication in the construction or increase in t e cost price of the apparatus.

i It is of course understood that the intensity-of the source of ultra-violet rays and the dimensions of the sterilizer vary accord, ing to the quantity of liquid to be sterilized in a given time. When the apparatus is necessarily of large dimensions, particularly as regards height, it is desirable, for the purpose'of insuring homogeneous illumination even atshort distances, especially if the luminous source employed bepractically reduced to one point, to replace the flat bases ofthe cylinder by truncated cones, the angle of the summit of which is such that the whole vat may be swept by the effective radiation, without shadows being thrown. This arrangement has the further advantage of increasing the strength of the apparatus. The apparatus in this case consists substan tially of a vat 6 with cylindrical sides, The two bottoms of the vat are formed by truncated cones-7 and 8 the summits of which are opposite each other. The liquid may, for example, be introduced through one or more tubular bodies 9 which join onto a -g rated, vat '6 and passesout rough the opening 11,.and-,.the pipe '12 alter being exposed to the action of the ultra-violet rays emitted by the luminous source l3 during the whole time it remained in the vat. As'this source is very near the discharge opening 11, the bactericidal action of the ultra-violet rays is excited with the aid 0 the maximum of serviceable efiect at the very moment when the liquid leaves the apparatus. This latter rests on legs or is en ported ,by any other suitable means.

the weight t the liquid 'it contains may be considerable, it is advisable that the bottoms should be reinforced by ribs 14 fixed on. the sides 6 and on the pipe 12 in the case of the I lower ribs, andonithe rim 15 in the case of -according to the quantity of liquid the upper ribs.- lhe luminous source is low ered through the rim 15 and the openings 16 and 11 to the center of the cavity formed b the liquid in consequence of the ra 'tion' to which it is subjected. e

dimensions of the apparatus and the intensity of the source of ultra-violet ravs vary to be treated in a given time.

What claim and desire to secure by, Letters Patent is:

' 1'. Ana paratus for-sterilizing liquid, by

the aid 0 ultra-violet-rays, comprising a cylindrical receptacle provided withan in let orifice extending tangentially to" its peripheralwall and a centrally arranged outlet in its bottom, and means for conducting liquid under pressure to the inlet.

2. An apparatus for sterilizing liquid, -by V the aid of ultra-violet rays, comprising a I stationary receptacle having an interior cy-' lindrigal chamber provided with an inlet orifice in the sideewall and acentrally ar ranged outlet in itsbottorn, of means for introducing' liquid "into said chamber under pressure so that it will rapidly rotate therem and form a depression above the outlet, for the purpose described.

3. An ap aratus for sterilizing liquid, by

i ultra-violet rays, comprising means for causing a body of liquid to reyolve at such rate as to provide afcentral depression therein, and a source oflight extending .into said depression.

4. An apparatus for sterilizing liquld,by

theaid of ultra-violetrayacemprising a rethe tangentially arranged inlet orifice and.

having an outlet Iarra-nged centrally of. its .bottom, said chamber decreasing in .depth from its side. wallto' the outlet, and a. source 50f light-arranged within the ,zsliallower por-.

tionofthe chamber. i In testimony whereof I ailix my signature .inpresence ofv two; witnesses.

ALFRED NEVEU. Witnesses: r

Dear; B. Mason,

CLAUDIUB Luoson. 

